Simulation processes have been carried out to assess the mass and energy balances of the pyrolysis process in an auger reactor pilot plant. Forest woodchips were fed into the reactor with 6.2% of moisture content. Previous experiments showed that the highest bio-oil yield (59%) was achieved at 773 K and applying solid residence times longer than 2 minutes. These conditions were modelled using Aspen HYSYS simulation software and results showed that the process was not...